同音字组词。
zhàng ____ 篷 赊 ____ 膨 ____ ____ 碍 拐 ____
下图是DNA分子平面结构示意图,下列描述错误的是
①氧元素____;
②地壳中含量最多的金属元素____;
③写出元素符号“O”的意义:____.
—Yes, he loves kids and he wants to be a teacher in the future.